Variable-speed drill.



F. H. HEDINGER. YARIABLE SPEED DRILL. APPLICATION FILED AUG.5| 1915.

Patented Nov. 16, 1915.

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- nivirnn snares PATEEIT enr c FRED H. HEDINGER, on NEW YORK, 1v. Y nssienort rojzrosnrn nosnnrnnn, or"

. NEW YORK, N. Y.

. VARIABL -sneer DRILL.

To all whom it may concern: r 1

Be it known that I, FRED Hnornenn, a citizen of Switzerland, and a resident of the city of New York, 7 Tompkinsville, borough of Richmond, inthe county of Richmond and State of New York, have invented anew and Improved Variable-Speed Drill, of which the following is a full, clear, and exact description. i h

This invention relates tometal working machinery andhas particular reference to tools or implements such as breast drillsor the like adapted for hand or power operation at variable speeds. f

Among the objects of this invention, more definitely stated, is to provide asimple, reliable and quickly manipulated means for changing the gearing through whichthe speed of the boring or drilling tool may be changed. j j

With the foregoing and other objects in view the invention consists in the arran 'ement and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact detailsof construction disclosed herein, still for the purpose of illustrating a practical embodi ment thereof reference is had to the accompanyingdrawings, in which like reference characters designate thefsame parts in the.

several views, and in which Figure 1 is a front elevationof the device showing the parts in normal position atthe highest speed adjustment and indicating in dotted. lines the positions of the, movable parts at the time the pinionis to be shifted;

Fig. 2 is a vertical transverse section sub stantially on the line 22 of Fig. 1; Fig. 3 is a transverse sectionaldetail on the broken line 83 of Fig; 1; and Fig. 4 is a detail perspective view of the retainer.

Referring more particularly to the draw ings, I show a breast drill comprising a main shaft or support 10 to the lower end of which is rigidly connected a socket member 11 hav ng a transverse cylindrical bearing 12 extending into the same from one side and having a bearingsocket 13 formed in its bottom. At 1. 1 is shown a bracket formed upon or integral with the socket member 11 and having a bearing hub 15 at its lower end havinga vertical bore 16 in alinement withthe main shaft or support 10.

A tool spindle 17 is j ournaled for free ,rotationin the hub 15 and is provided at its Specification of Letters Patent.

adapted (to bear against a bearing disk 19 seated in the bottom of the socket 13. The upper end 17 oftheSPindle 17 is formed polygonal in cross section for cooperation with a pinion 2O slidable thereon, said pinion beingprovided with a circular series of peripheral teeth 21 preferably with rounded or spherical ends. g'l he tool spindle 17 has its main-bearing inthe hub 15 r ame Nov. '16, was. Application filed August 5, 1915. Serial No. 43,779.

upperjendwith an anti-friction ball i which is of considerable length andthat portion of the spindle therein'is. cylindrical andis retained in position from longitudir nal displacement in the bracket and' its hub by means of a set screw 22 extending freely into a groove 17 formed in the cylindrical portion of thespindle. Any suitable type of chuck 23 is carried by the lower end of the tool spindle, such feature per 86 not con stituting any part of this present invention.

The main driving element comprises a disk-shapedwheel 24; having a plurality of circular series of-holes25, the holes of the several series being concentric with respect to the center of the disk and a cylindrical stud or axle 26 fittedloosely in the socket 12. In its normal position the disk is held closely against the end of the socket member lland with the teeth 21in mesh with one series of the holes 25. This'cooperation between the disk and the pinion insures the pinion from endwise movement upon the polygonal portion of the spindle.

As asuitable means for holding the disk positively in said normal p'osition,x1 provide a retainer in the form ofa sleeve 27 fitted upon the main shaft 10 and providedon one face at its lower end with a notch 28 adapted to receive a stud 29, to limit the downward movement of the sleeve andpositively to prevent rotation thereof when, embracing saidstud. The sleeve carries a rigid keeper 30 having a lip 30 adapted to engage over the periphery of the disk 24 in normal position, thereby positively preventing the lateral movement of the disk and the endwise slidablc movement of the axle 26 outwardly with respect tothe socket12. The retaining member or sleeve 27 1sheld resiliently in its normal holding position by means of a spring 31 located within the sleeve and acting between a shoulder 32 therein and a shoulder 33 fixed to or formed uponthe main shaft 10. The lower end of the sleeve 27 is smooth and circular but for 1 the rate of speed of the tool "spindle, with respect to the angular; speed of the'jdri ving I the notch 2 8'formed upwardly therein. As is usual with devices ofithis character, a stationary handle 34 is provided upon the bracket ltand extends laterally inali-ne' V ment withfthe axis of the axle 2.6.. An op crating handle 35 also is securedthrou'gh an arm 36ft'o the driving member V 1 s h t t g g d scri tion, the opera; i n of the devicewill be readily understood.

In order to 'changethe gearing soas to yary member, theoperator grasps the sleeve 27 i v and draws it upwardly against the force of the spring 81 far enoughv for the lip- 30 to 1 swing clear ofthe periphery of the disk Qtandtheno'tched portion ofthe sleeve to swin'g cl'earo-f thestud'29. Upon rotation of the/sleeve at such time, it will be held in "its elevated-position by reason of the v rsmooth 'lower edge of the sleeve resting upon ,s ,the stud 29 ThediskfZd and itsaxle-626 may the'nbe moved outwardly far enough for the pinion to be free from the disk and the pinion then be moved-freelynp or down along the polygonal portion at the spindle according to whether the'speed is to be lowered or increased"; When the teeth of the pinion are brought opposite any desired'serie's of holes 25, the disk and axle may be returned to their-normal; position where they willflbe locked again by the retu-rn'ofthe keeper to its normal position. In

turning the keeper around to the normal po-' sition, itwill automatically snap into en gagement-with the disk as soonas the re-' quired degree of rotation is givenit, by virtue of the force of the spring within the sleeve. 'The adjustment, therefore, may be quickly accomplished, and, when made, the

- in alinement with the shaft, a pinion mounted slidably upon the tool spindleand held from rotationthereon independently thereof, a diskshaped gear having an axlejour- 'nal'ed in the socket member'perpendicularly to the aXis of the shaft and spindle and 1 movable laterally from said aXis','sa id gear P575 0f, holes adapted to mesh respectively with the teeth'of the'pinion, and means carried by member having a plurality of circular series the shaft aforesaid serving to hold the gear diskin normal position meshing with the 2. In a drill, the'combination of main shaft, a socket member carried by the lower end of the'shaft', said socket member: having alateral and'a bottom bearing socket having their axes at right angles to each other, a bracket secured to the fsocketmember and projecting downwardly terminating in a 1 bearing hub having a bore in alinement with the bottom socket of the socket member, a

tool'spi'ndle journaled in the hub and having.

its. upper end journaled in said bottom socket, a pinion mounted'upon the spindle 7 between the socket member and the hub and adaptedito slide along the same but held from rotation thereon independently ofthe spindle agearwheel supported for rotation in the other socket of thesocket member and having a plurality fie-f} circular series of holes adapted to mesh with the teeth ofthe pinion inanypositi'on of adjustment of the pinion along'the spindle,and means to hold the 7 gear wheel from moving laterally out ofensgagement with the pinion, said lastmentioned means including a sleeve'surrounding the shaft and haying a keeper projecting over the periphery offithe wheel, means acting upon the sleeve serving tonormally hold the keeper in engaging position, and means to prevent rotation of the retainer when in engaging position. 7

3. In adrill, the combination of a rigid shaft, a socket membersecuredto the lower end 0f the sha fthaving a bearing socket therein with its axis transverseto the axis of the shaft, a gear wheel j ournaled in said so'cket'for operation ina plane close toxthe ax'is of the shaft, and means slidably mount- 7 ed npon theshaft adapted to engage the pe- V riphery of the wheel and hold it in normal position close to the shaft.

45. In a drill, the combination ofj a main 7 "shaft, a socket member secured to :o-ne end of "the shaft and having bearing sockets 205 formed therein with their axes at right angles to each other, a wheeljournaled in any one of said sockets, a'tool spindle journaled' in the "otherof said sockets,j a pinion mounted upon the spindle and adaptedto slide thereon but bein'gheldfrom rotation independently thereof, said wheel and pinion ihaving interengaging tooth'fea'tures operative at any desired adjustment ofthe piniong'the wheel being movable away from the socketmemberto release the pinion for endwise movement on its spindle, and retainer 7 'meanson the shaft to hold the gear wheel from lateral movement under normal condi tions, said "reta ner means comprising a sleeve rotatable and endwise movable upon the shaftincluding a lip-engaging around the periphery of the wheel and a spring having a plurality of concentric series of holes 'formedin one side thereof, supporting tending to holdthe lip'inlengaging posij tion r pinion andholding the pinion from endwise movement on its spindle.

means for the disk permittinglateralmoye' ment thereof, a pinion having ,a seriesfof roun'd ended teeth adapted to enter and mes'h 1 I with the several series of holes and. whereby vent the lateral movement thereof and disthe pinion is held from endwise movement, a engagement from the pinion. spindle on Which said pinion is joiirnaled, FRED H. HEDINGER. and means engagingover the periphery of \Vitnesses: a a 5 the disk on the side of the axis thereof op- GEO. L. BEELER,

posite the pinion serving to normally pre- Jos. ROSENFELD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

